So I have a 06 X-Fire currently fit with a 136" X 2" shoe. I can easily bump it out to 144". I have been debating all summer long whether to do it. Those of you that have done this mod, did you notice a significant performance increase?
If you do go to a 3.0 pitch track YOU WILL NEED ANTI STAB WHEEL KIT!!!!! We put my camo challender 141 on a X fire, first ride out he poked a rail through and broke one of the fiberglass rods. Also had to get a freedom axle with 8 inch wheels to take up the slack. The X fire rails have a different approach angle and I believe are a little shorter. M-fire8 should be chiming in here soon. You could also PM him if you need more info